Abstrakt:

According to the results obtained, it was observed that extraction reproducibility of lipophilic analytes into carbon pastes usually depends on many factors which reflect the homogeneous distribution of carbon particles in corresponding paste, shape and size of present carbon particles, height of the paste column in an electrode holder and presence of solid contaminants or air bubbles on electrode surface. The effect of all the factors mentioned on the reproducibility of capsaicin extraction was studied by square wave voltammetry. It can be concluded that an extraction of electroactive lipophilic compounds can provide satisfactory reproducibility, thus allowing development of electrochemical methods based on similar kind of accumulation.